Phase 9: safe start island, better quest book, every useful item obtainable

- Button Isle is peaceful: wild Pokémon only fight a player who hit them first
  (tuning/server.json peaceful_zones); its apricorns and coal make Poké Balls
  (4 apricorns + coal or charcoal), and the world report checks it has enough.
- Quest book: no boilerplate; each zone page says what is particular to it, and
  every zone that needs gear or a field move to be safe has its own quest. New
  page on the bigger mods (Cold Sweat, Fight or Flight, Cobblebase, breeding,
  veins, shared loot, maps and info).
- The Mire's poison stops 10 blocks below the surface.
- Player battles never cost a Pokémon (CobbleHardcoreMon config, mixins, and the
  companion mod's own permadeath).
- tools/item_audit.py: every item with a use has a source on the island; new
  sources for the gaps it found (species additions, three recipes).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

pack/config/ftbquests/quests/chapters/deep_sea.snbt

@@ -7,7 +7,7 @@
 		id: "cobblemon:mystic_water"
 	}
 	id: "720F052C0D14A813"
-	order_index: 12
+	order_index: 13
 	quest_links: [ ]
 	quests: [
 		{
@@ -24,7 +24,7 @@
 				}
 			]
 			x: 0.0d
-			y: 0.0d
+			y: -0.75d
 		}
 		{
 			dependencies: ["731852EDB1EE12B7"]
@@ -75,5 +75,19 @@
 			x: 4.0d
 			y: 0.0d
 		}
+		{
+			icon: {
+				id: "minecraft:turtle_helmet"
+			}
+			id: "7421E4AF4A12111C"
+			tasks: [
+				{
+					id: "38F8AD9CF938DB2E"
+					type: "checkmark"
+				}
+			]
+			x: 0.0d
+			y: 0.75d
+		}
 	]
 }